Skip to main content
ARS Home » Plains Area » Clay Center, Nebraska » U.S. Meat Animal Research Center » Reproduction Research » Research » Research Project #434215

Research Project: Dietary Effects on Sow Productivity to Three Parities

Location: Reproduction Research

Project Number: 3040-31000-095-12-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Dec 16, 2017
End Date: Mar 30, 2019

Objective:
The primary objective of this project is to determine the effects of dietary manipulation (amino acid level) on gilt development and sow lifetime productivity.

Approach:
Litter of origin information will be recorded for newborn gilts, including birth sow, nursing sow, parity of sow, immunocrit, birth and weaning weights, number born alive and number weaned. Subsequently, gilts will be fed three diets differing in SID lysine designed to result in differences in growth rate. Diets will be fed from 100 days of age until 220 days of age. At 160 days of age, gilts will be observed for estrous behavior and will subsequently be mated on their second estrus after puberty. Gilts will be weighed and ultrasounded on day 100 and at 28 day intervals until leaving the experiment at 220 days of age. They will then be followed through three parities, recording litter information at each each parity (Sow, parity, immunocrit, birth and weaning weights, number born alive and number weaned).